In a kettle, combine the strawberries, orange juice and zest. Stir in pectin. Bring to a rolling boil over high heat, stirring constantly. Add sugar; return to a rolling boil. Boil and stir for 1 minute. Remove from the heat; skim off foam. Pour into jars or freezer containers; cool to room temperature, about 1 hour. Cover and let stand overnight or until set, but not longer than 24 hours. Refrigerate or freeze.