The Ruler Game: Learn To Read a Ruler

Instructions:

• Use this game to learn and practice your ability to read a standard English ruler (also known as an inch ruler, customary ruler, or imperial ruler).
• This game can be played using either a mouse or a touchscreen.
• Press the Play Game button to begin playing the game.
• A measurement to select will appear above the ruler image.
• Move your mouse (or slide your finger on a touchscreen device) over the ruler image until the green bar reaches the mark for the displayed measurement. To check your answer, click on the ruler (or lift your finger on a touchscreen device).
• For each correct answer, you will be awarded points. Your score is displayed on the left side of the Results Bar that appears below the ruler.
• Points are awarded based on the following table.

  Level	Time Limit	Points
  1	10 seconds	10
  2	9 seconds	20
  3	8 seconds	30
  4	7 seconds	40
  5	6 seconds	50
  6	5 seconds	60
  7	4 seconds	70
  8	3 seconds	80
  9	2 seconds	90
  10	1 second	100

• For every 10 correct measurements, you will advance to the next level. Your current level is displayed in the Results Bar below the ruler image.
• The timer is displayed to the right of the score in the Results Bar. As time passes, the bar shortens. It begins green, turns yellow, and finally turns red when only a few seconds remain.
• If you have not selected a measurement before the time runs out, you will receive a strike for selecting 0.
• For each incorrect answer, you will receive a strike. After three strikes, your game is over. The number of strikes you have received is displayed on the right side of the Results Bar below the ruler image.
• After an incorrect answer, in Find mode, the game shows the correct answer with a red line. In Type mode it tells you what the correct answer would have been.
• Click the Settings button to adjust your preferences for the game.
  • Timer: The default setting is On. Select Off to have unlimited time to answer.
  • Sounds: The default setting is On. Select Off to mute all game sounds.
  • Questions: The default setting is Sixteenths. You may want to start with Wholes and work your way up through the remaining options for a greater challenge: Wholes, Halves, Quarters, Eighths, Sixteenths, Thirtysecondths, and Sixtyfourths. Note: The Questions setting must be less than or equal to the Ruler Marks setting. If you select a greater option, the Ruler Marks setting will be automatically adjusted accordingly.
  • Ruler Marks: The default setting is Sixteenths. This determines how precise you must be when you select your answer. If most of the rulers you use in the real world only have eighth marks, you may want to select Eighths here. If you often use ruler that have thirtysecondths or sixtyfourths marks, you may want to select one of those options. Note: The Ruler Marks setting must be greater than or equal to the Questions setting. If you select a lower option, the Questions setting will be automatically adjusted accordingly.
  • Ruler Length: The default setting is 4". You can select any length from 1" to 12". Selecting the Automatic setting will adjust the ruler length to fit your browser window. Note: If you select a length that exceeds the width of your browser window, it will be automatically adjusted to the longest length that will fit on your screen.
  • Notation: Choose how numbers are displayed. The default format is Fractions. You may also select Decimals.
  • Fractions:
    • The default setting is Both. In Find mode, questions can be simplified or unsimplified. In Type mode, you can enter your answer in simplified or unsimplified form.
    • Simplified: in Find mode, the game shows questions in simplified form, and in Type mode, you must enter your answer in simplified form.
    • Unsimplified: in Find mode, the game shows questions in unsimplified form, and in Type mode, you must enter your answer in unsimplified form.
  • Mode: The default mode is "Find". You can also select "Type". In Type mode, numbers appear below the ruler, and you can enter the correct answer by either clicking these numbers or using your keyboard. First, enter whole inches, press Space, and then type your fraction using the slash key. For values less than an inch, simply type the fraction. Once you've entered your answer, click "Submit Answer" button or press Enter on keyboard. Note: In "Type" mode, the starting time is 20 seconds, and it decreases by 2 seconds after every 10 correct answers.
  • The current settings are always displayed in the lower-left corner of the ruler image.
  • The settings you have selected are stored in your browser for the duration of your session. You can refresh your browser to start a new game, but if you close it, the settings will reset to default the next time you visit the game.