Standards-aligned practice in math, science, English, and social studies for grades K–12. Study at your pace, track progress, and prepare for exams with confidence.
Explore SubjectsContent mapped to state and national frameworks across core and elective areas.
Arithmetic through AP Calculus. Number sense, algebra, geometry, statistics, and problem-solving strategies aligned to Common Core.
Grades K–12Virtual labs in biology, chemistry, physics, and earth science. Activities follow NGSS performance expectations with vocabulary support.
Grades 3–12Comprehension, vocabulary, grammar, and argumentative writing. Supports Lexile-leveled complexity progression from elementary through high school.
Grades K–12World history, U.S. government, geography, economics. Primary-source analysis builds critical thinking per the C3 Framework.
Grades 3–12Review for AP Bio, APUSH, AP Calc AB/BC, AP English, and 12 more subjects. Includes timed practice exams with scoring rubrics.
Grades 9–12Full-length practice tests, detailed explanations, and adaptive question banks that target gaps in reading, writing, and math.
Grades 10–12Intro and intermediate Spanish, French, Mandarin, and German. Audio pronunciation drills and cultural literacy modules included.
Grades 6–12Computational thinking, data literacy, engineering design. Scaffolded problem sets aligned to CSTA standards for all experience levels.
Grades 5–12Real-time mastery data by standard. Spot skill gaps early and assign targeted remediation before they widen.
Difficulty adjusts to each student. Struggling learners get scaffolded hints; advanced students face enrichment challenges.
Assign work, view class averages, export grades. Compatible with PowerSchool, Canvas, and Google Classroom.
Classroom quiz tournaments, school-wide math bowls, and achievement certificates to motivate healthy competition.
Course materials reviewed by certified educators and updated each school year.
Linear and quadratic functions, polynomials, rational expressions, systems of equations. Graphing-calculator walkthroughs and word-problem strategies.
Cell structure, genetics, evolution, ecology, human body systems. Virtual dissections and Punnett-square activities.
Colonial era through the 21st century. Document-based questions, timeline activities, and DBQ essay practice for the AP exam.
Close reading, evidence-based writing, literary analysis, persuasive essays. Tier 2 academic vocabulary instruction throughout.
Proofs, congruence, similarity, circles, coordinate geometry, right-triangle trig. Interactive compass-and-straightedge constructions.
Atomic structure, periodic trends, stoichiometry, bonding, thermodynamics. Safe virtual lab simulations for every reaction type.
"My Algebra II students raised unit-test averages by 14 points after three weeks on the adaptive modules. The standards reporting saved me hours."Dr. Patricia Morales, Math Dept. Chair
"I studied for APUSH here and scored a 5. The DBQ practice with instant thesis feedback was the difference."Jordan K., 11th Grade
"The Lexile-leveled passages make differentiation across my caseload so much simpler. Finally a tool built for reading specialists."Mrs. Chen, Literacy Intervention
"Virtual chem labs let students explore reactions safely before we touch real chemicals. The pre-lab quizzes make sure they're ready."Mr. Williams, AP Chemistry
Supplemental materials beyond the core curriculum.
PDF review sheets for every unit, sorted by topic and grade. Great for offline cramming.
AP dates, SAT/ACT windows, and state-test schedules with countdowns and prep milestones.
Spaced-repetition flashcards for academic vocab across every subject. Supports Quizlet-style modes.
Reference sheets for algebra, geometry, trig, physics, and chemistry. Match state-approved testing formats.
Weighted and unweighted GPA on standard, honors, and AP scales. Plan your path to graduation.
Templates for five-paragraph essays, DBQs, argumentative papers, and lab reports in MLA / APA format.
K through 12 in math, science, ELA, social studies, world languages, and STEM. AP and SAT/ACT prep targets grades 9–12.
Every item maps to CCSS, NGSS, C3 Framework, or CSTA standards. Our curriculum team reviews content each year against the latest state adoptions.
Yes — the teacher dashboard supports individual assignments, custom playlists, due dates, and mastery reports. Works with Google Classroom, Canvas, and Schoology.
We comply with FERPA, COPPA, and all applicable state student-privacy laws. Data is encrypted in transit and at rest, and we never sell it. Annual third-party audits verify compliance.
Item response theory estimates each student's ability. Correct answers raise difficulty; wrong answers trigger hints and lower difficulty to rebuild foundations before moving on.
Free for students through participating districts. Family accounts include a free tier for core subjects; premium adds analytics and printables. Ask your school's tech coordinator about licensing.