Study and Productivity
How to Solve a Quadratic Equation: Formula and Examples
Solve ax squared plus bx plus c equals zero with the quadratic formula, understand the discriminant and complex roots, and check answers with a solver.
Category
Study and Productivity
Good routines beat last-minute effort. These guides show how to study with the Pomodoro technique, build a class routine, calculate a semester GPA or CGPA and count down to an exam or deadline. Each one is a practical tutorial with a free, browser-based tool.
9 guides
Study and Productivity
How to Check the Readability of Your Writing (Flesch)
Understand the Flesch reading ease score, what grade level means, how to read your result and simple edits that make English text easier to read.
Study and Productivity
How to Calculate Standard Deviation and Variance
Learn how to find the mean, variance and standard deviation of a data set, the difference between sample and population formulas, with a worked example.
Study and Productivity
How to Build a Habit Tracker You Will Use (Free Printable)
Make a simple monthly habit tracker, choose habits that stick, use the research on habit formation and print a free A4 sheet in your browser.
Study and Productivity
How to Calculate a Weighted Grade and Final Exam Score
Learn how weighted grades work, how to calculate your current grade, and how to find the final exam score needed for your target.
Study and Productivity
How to Study With the Pomodoro Technique (Focus Sessions)
Learn the Pomodoro method, how long to focus and rest, and how to use a free online timer to study or work without burning out.
Study and Productivity
How to Make a Class Routine or Timetable (Printable A4 PDF)
Create a weekly class routine with periods, subjects and times, in English or Bangla, and download a printable PDF.
Study and Productivity
How to Count Down to an Exam, Wedding or Deadline
Set a countdown to any date and time, see days, hours, minutes and seconds left, and use it to plan study and work.
Study and Productivity
How to Calculate Semester GPA and CGPA (4.0 and 5.0 Scales)
Learn how GPA and CGPA are calculated from credits and grades, and use a calculator for the Bangladesh 5.0 or US 4.0 scale.