How Flashy works
Daily PSAT and SAT practice finds what your student hasn’t got yet. Spark, Flashy’s AI learning companion, helps fill those gaps. Then a fresh question your student answers alone shows whether it stuck.
Practice and help are kept apart on purpose. Spark is not there while your student answers practice questions, and only what they answer on their own counts toward their progress. So their progress shows what they can do alone, which is what test day asks.
Flashy is free PSAT and SAT practice that adapts to each student. Each step below rests on a well-studied idea about how people learn; the studies are named at the bottom of the page.
Daily practice that adapts, skill by skill. Spark is not there while your student answers a practice question; that work is their own. A step-by-step explanation follows every answer.
Questions your student missed wait in Study with Spark for two weeks. There, Spark goes over a missed question, explains an idea they never learned, or teaches a short lesson.
Then Spark steps back, and your student answers a new question like it on their own. Only what they answer on their own counts toward their progress.
The skill keeps coming back in daily practice over the following days and weeks, so the next gap shows up and the cycle starts again.
In each one, Spark works through it with your student, then hands them questions to try.
Spark starts by asking what your student tried, and listens before it explains. Then it walks through the solution with them and finds the slip. Spark sees which answer they picked and why each wrong choice tempts, so it can talk about their mistake, not a general one.
When your student marks a question “Never learned this,” Spark explains the idea through one complete worked example, walks through it, then gives them a quick question to try alone.
A warm-up, a few problems worked with Spark, then a check on new questions.
Each part of Flashy follows a well-studied idea about learning. These studies are about learning in general; Flashy has not published results of its own.
All practice in Flashy is answering questions, not rereading. The question after Spark is answered alone.
Every skill comes back regularly, and the longer since it was practiced, the sooner it comes up again.
Questions from different skills are mixed through each day’s practice, and within a skill Flashy prefers different question types.
Each skill’s level is set so your student gets about 85 percent of questions right at their level: hard enough to learn from, not so hard they stall. Why that range.
When an idea is new, Spark shows a complete worked example before your student tries one.
A step-by-step explanation appears right after every answer, right or wrong.
Spark guides your student through a problem, then steps out. Their answer to the next question, given alone, is the one that counts.
PSAT or SAT questions matched to their test. Difficulty adapts over time to their answers, skill by skill. You choose 5 to 120 minutes a day.
A step-by-step explanation follows every question, so a mistake turns into something they understand.
Spark, Flashy’s AI learning companion, goes over a question they missed or marked, explains an idea they never learned, or teaches a short lesson built from their gaps.
Your student opens the question with Spark. Spark asks what they tried, then talks through where it went wrong, one step at a time. Then Spark gives them one more question like it, and they solve that one on their own.
Working through a missed question with Spark uses the plan’s monthly time to Study with Spark. Practice and step-by-step explanations stay open after it runs out, and the time refills the next month.
No credit card needed to start. See full pricing.
A sample Flashy question · Math · Linear functions
A monthly phone plan is modeled by a linear function D(g), where D(g) is the total monthly bill, in dollars, when the customer uses g gigabytes of data. A customer who uses 4 GB pays $52, and a customer who uses 9 GB pays $77. Which of the following defines D?
Answer: B
The slope is a = (77 − 52)/(9 − 4) = 25/5 = 5 dollars per GB. Using D(4) = 52: 52 = 5(4) + b, so b = 52 − 20 = 32. Therefore D(g) = 5g + 32.
Choice B is correct.
Choice A is incorrect — (D(g) = 5g + 52) uses the y-coordinate of the first data point as the y-intercept; the student wrote b = 52 because D(4) = 52, without subtracting 5 × 4 from it.
Choice C is incorrect — (D(g) = 25g + 32) reads the rise D(9) − D(4) = 25 as the slope without dividing by the run; the student computed the difference of the dollar amounts but forgot to divide by the difference of the GB inputs.
Choice D is incorrect — (D(g) = 5g − 32) flips the sign of the y-intercept; the student computed 52 − 5(4) = 32 but wrote the result with the wrong sign in the function rule.
Spark goes over questions your student has already answered, so it can talk through the solution. It starts by asking what they tried, and it explains with worked examples. Then it steps back, and your student answers a new question on their own.
No. Spark is not there while your student answers a practice question; that work is their own. Spark comes in afterward, when they Study with Spark.
Each step uses a well-studied idea about learning: answering questions, spacing practice out, mixing skills, keeping questions hard but doable, worked examples, explanations right after an answer, and help that steps back. The studies are listed on this page. They are about learning in general, not about Flashy.
Ready when you are
Daily practice, explanations and progress are free for every student. Free also includes 30 minutes a month to Study with Spark, Flashy’s AI learning companion. No credit card needed.
