Dzantik’i Heeni Middle School eighth-grader Pua Ahhney, right, and Elizabeth Eriksen fish for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers, Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

Dzantik’i Heeni Middle School eighth-grader Corey Barnes gets direction for casting while fishing for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers, Bobby Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

A seal watches a fishing lure hit the water as eight-graders from Dzantak’i Heeni Middle School fish for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. (Michael Penn | Juneau Empire)

Dzantik’i Heeni Middle School eighth-grader Riley Kellar, right, is helped by Teacher Bobby Jones while fishing for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers, Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

Dzantik’i Heeni Middle School math teacher Tennie Bentz helps students pick lures while fishing for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers Bobby Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

Dzantak’i Heeni Middle School eighth-grader Jaylynn Martin, right, is helped by Teacher Bobby Jones while fishing for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers, Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

Dzantak’i Heeni Middle School eighth-graders Remi Starks, left, Zariah Knight, Dawn Hoit and Charlize Brown, right, react to a salmon on their line at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers, Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

Eight-graders from Dzantik’i Heeni Middle School pose for a pictures after fishing for salmon at the Wayside Park on Channel Drive on Friday, Aug. 30, 2019. The fish will be used in a dog treat business the students are developing to raise money for a water filtering system to be used at the school. Two math teachers, Bobby Jones and Tennie Bentz, are having the students start four businesses as a way of teaching the use of math in the real world. (Michael Penn | Juneau Empire)

Dunkin’ Doggo design by Savannah Johnson for her eight grade math class business making dog treats out of local salmon. Photo courtesy Savannah Johnson