Wash the jars in hot soapy water, rinse well and dry.
If the strawberries are already quite clean, then place them in a colander and rinse them under cold water, place them (single layer) on a dry clean tea towel and gently dry. Then hull and slice or chop depending on your preference.
If the strawberries are not very clean (eg. just picked or it just rained and they have some dirt on them) then fill a large bowl with cool water, add the strawberries and move them around until they are clean. Remove the strawberries and place them (single layer) on a dry clean tea towel and gently dry. Then hull and slice or chop depending on your preference.
Place the sliced or chopped strawberries in a large bowl, sprinkle with lemon juice and sugar. Gently toss together. Spoon into the clean jars, leaving approximately one inch (2 centimeters) free space between the strawberries and the top. Then place jars in the freezer. Will keep up to a year. Enjoy!