The free browser versions are on the tools page, and paper versions are on the printables page.
Covert Mail
- How to learn Morse code: Learn Morse code the way that sticks: by sound, with the Koch method and Farnsworth spacing, ten minutes a day. Free trainer included.
- Secret codes for kids: Six secret codes for kids, easiest first, with examples, free printable keys and a ready-made code hunt for a party, a class or a troop.
Handyman Calc
- How to add feet and inches: Add, subtract and divide feet, inches and fractions of an inch by hand, with worked examples, decimal feet, and the mistakes that cost a board.
Initiative Tracker
- How initiative works in 5e: How initiative works in fifth-edition combat: rolling, breaking ties, surprise, conditions that end on a turn, death saves, and keeping the table moving.
Chess Clock
- How to use a chess clock: How a chess clock works: setting it up, when to press it, what 5+3 and G/30 d5 mean, increment versus delay, and what happens when a flag falls.
Dead Center
- How to measure card centering: Measure a card's centering with a ruler, a template or a photo: where each border ends, the arithmetic, and how much half a millimetre moves it.
Let Them Pray
- How to keep a prayer list: A plain method for a prayer list on paper or a phone: what to write, dated updates, what to pray first, and what to do when a prayer ends. Any faith.
Card Lab
- How to make your own trading cards: Make your own trading cards at the real 2.5 x 3.5 inch size: what goes on a card, which card stock, printing the backs so they line up, and cutting them clean.
Practice Proof
- How to keep a music practice log: A practice log method for music students and parents: what to write at the lesson, minutes against a goal, one line on what got better, and what to bring back.
Househand
- How often to test smoke alarms: Test smoke alarms monthly, change a replaceable battery yearly and replace the alarm at 10 years. What a chirp means, and how sealed alarms differ.
- How often to flush a tankless water heater: Rinnai, Navien and Rheem each give a flushing interval for tankless water heaters. Here is how water hardness changes it, and what a descaling flush involves.